Gwen Stefani and Jimmy Fallon Reimagine ‘Hollaback Girl’ Using Classroom Instruments — and It’s Bananas

“I had been so put down that I was like, ‘I’m just going to show them what I got.’ It was that attitude when I went in the studio, and I was like, ‘OK, this is the cheerleader I always wanted to be, and I want it to sound like a marching band.’ Then he goes, ‘I’m going to go eat. I’ll be back. Finish up.’ ”

“Then we did the ‘bananas’ part, and we knew after we wrote it — we just made a cultural collision,” she continued. “We were jumping up on the couch, and we got the champagne.”